Optical Encoders

Avago Technologies (San Jose, CA) has introduced the AEDR-87xx series of 3-channel reflective optical encoder devices for use in low-power, miniaturized motion control systems such as stepper motors, electrical actuators, piezoelectric drives, and portable medical appliances. They feature encoding resolution up to 318 lines per inch (LPI), and support 3.3V and 5V supply voltage for low-power applications, and dual analog outputs interfacing directly with external interpolator for high-precision motion control measurements.

Other features are dual-channel digital and analog outputs; a built-in interpolator for 4x, 8x, and 16x interpolation; built-in automatic LED current regulation; operating temperature range from -20 to +85°C; and a compact size of 3.95 × 3.4 × 0.956 mm.

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